Sunday Morning

With summer on the horizon, we talk to neuroscientist and journalist, Dr David Cox to find out how much we should drink every day, and what we should be drinking.

Herald rugby writer Gregor Paul joins us with his take on the latest from France in the Rugby World Cup.

Sarah Peirse is best known for her screen roles as Kate in Rain and Pauline Parker's mother, Honora, in Heavenly Creatures. She reprises her role as the formidable American writer, Patricia Highsmith in the acclaimed thriller Switzerland presented by Auckland Theatre Company which opens at the ASB Waterfront Theatre on September 19.

NY Times Australia correspondent, Natasha Frost joins us from Melbourne with the latest news from across the Tasman.

As the NZ Aerospace Summit gets underway next week in Christchurch, we're joined by NASA astronaut, Heidemarie Stefanyshyn-Piper. Astronaut Heidemarie M. Stefanyshyn-Piper, STS-115 mission specialist, took this self-portrait having just unstowed the forward Solar Array Blanket Box (SABB) on a space walk on the International Space Station. Photo: NASA Heide has performed five spacewalks, she's been up to the International Space station and down to the bottom of the ocean as well, as a Navy dive commander. Her work now is to encourage other young women to pursue careers in space.

Richard Osman has now joined the ranks of those people in the United Kingdom who are referred to as a 'national treasure'. Even if you don't read his books and know his name you will almost certainly know his face if you watch TV, as a droll presence on many panel shows like Would I Lie to You? Or quiz shows such as Pointless. Richard is the also author of the hugely popular The Thursday Murder Club books. His latest book The Last Devil to Die is out now.

Susan Goldin-Meadow is a Professor of Psychology at the University of Chicago and one of the world foremost experts on gestures. She has found that gestures express substantive information which otherwise might not be conveyed in the speech it accompanies revealing secret thinking to those who pay attention.

Angst over advocacy adverts and content as official election period begins; AI - coming ready or not for news and music.

You're born, you live, you die - ageing, it would seem, is linear. Wrong. It turns out, the human body tends to age in parts, with some organs more susceptible to the ravages of time than others. However, geneticist Michael Snyder says nailing down which body part will fail first is a bit of a gamble because, "Everybody's ageing differently". But don't despair yet, recent studies have revealed that we are likely to belong to one of four different ageing pathways - and figuring out which 'ageotype' you are, might be the key to staying healthier for longer. Dr Snyder, director of Stanford University's Center of Genomics, joins Jim to discuss.

Getting the snacks in for the game isn't quite as simple for this Rugby World Cup. Early morning match times here in NZ means the usual pizza, chips and dips aren't so appealing. Award-winning food writer Lucy Corry, aka The Kitchenmaid joins us with some inspiration for snacks for watching the Rugby World Cup.